/*-
 * Copyright (c) 2005, Kohsuke Ohtani
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * printf.c - print formatted string
 */

#include <sys/types.h>
#include <machine/stdarg.h>
#include <boot.h>
#include <machdep.h>	/* for debug_putc */

#ifdef DEBUG

void
printf(const char *fmt, ...)
{
	static const char digits[] = "0123456789abcdef";
	va_list ap;
	char buf[10];
	char *s;
	unsigned u;
	int c, i, pad;

	va_start(ap, fmt);
	while ((c = *fmt++) != 0) {
		if (c == '%') {
			c = *fmt++;
			/* ignore long */
			if (c == 'l')
				c = *fmt++;
			switch (c) {
			case 'c':
				debug_putc(va_arg(ap, int));
				continue;
			case 's':
				s = va_arg(ap, char *);
				if (s == NULL)
					s = "<NULL>";
				for (; *s; s++) {
					debug_putc((int)*s);
				}
				continue;
			case 'd':
				c = 'u';
			case 'u':
			case 'x':
				u = va_arg(ap, unsigned);
				s = buf;
				if (c == 'u') {
					do
						*s++ = digits[u % 10U];
					while (u /= 10U);
				} else {
					pad = 0;
					for (i = 0; i < 8; i++) {
						if (pad)
							*s++ = '0';
						else {
							*s++ = digits[u % 16U];
							if ((u /= 16U) == 0)
								pad = 1;
						}
					}
				}
				while (--s >= buf)
					debug_putc((int)*s);
				continue;
			}
		}
		if (c == '\n')
			debug_putc('\r');
		debug_putc((int)c);
	}
	va_end(ap);
}

#endif /* !DEBUG */
